Usually it means the style of the writing or speech being used
redundancy is a state of not being need at all or anymore. people when they repeat their words it can become redundant and annoying for there is no purpose to them. so which sentence is stating something not needed. Redundancy usually involves repeating something or adding in information that is completely unnecessary. so look for that.
B) It is a participle functioning as an adjective
In my opinion, the best answer is A, due to the fact that the climax is the point in the story where the struggle and excitement comes out. The climax is a point in a story that express danger, thrilling, and chilling scenes. hope this helps, have an amazing day :)